my shifting has always been kinda rough and after recently changing my tranny fluid i thought it might help along with it also needed it. i was told by a very repectable mechanic that if i put limited slip differential fuid in with my valvoline 80W-90 it would help the roughness. i did and found not my change. does anyone have any tips. would using slick 50 or lucas help any. whats the best to use. or is there a better way to smooth it out?

 

Redline MT-90.